Web, mobile, backend, DevOps and AI in one delivery contour.
Kosmo Ranger / senior engineer for complex freelance delivery
I design and launch digital products that feel expensive, stay reliable and scale without chaos.
Full-stack engineer with strong experience in mobile, web, backend, DevOps, automation and AI delivery. I build products that feel premium, stay stable and survive production pressure.
Can enter a moving project fast, reduce chaos and recover control.
Works with legacy, greenfield, no-code, FlutterFlow and classic engineering stacks.
Alex Orlov
Direct communication, sharp estimates and practical delivery. I can join as an executor, product-minded engineer or emergency fixer.
Mission telemetry
Range of stack, depth of execution and real production experience.
40+
Projects launched
9+
Years in delivery
12+
Core domains covered
Expertise
From landing pages and mobile apps to ops tooling and release pipelines.
Strong freelance positioning works when the client sees range, ownership and the ability to bring the whole system into shape.
Web
Product web platforms
Client portals, internal dashboards, B2B systems and polished web products with strong UX and predictable delivery.
Next.jsReactSupabasePostgreSQLStripe
Web
Web platforms and client portals
B2B platforms, client portals, CRM dashboards and premium web interfaces with strong UX and clear business logic.
Next.jsSupabasePostgreSQLTailwindStripe
Mobile
Mobile apps and PWA delivery
Cross-platform mobile apps, PWA launches, release hardening and publication support from prototype to store-ready build.
FlutterPWAFirebaseSupabaseGoogle Play
Mobile
Mobile apps and PWA delivery
Flutter apps, PWA delivery, publishing workflows and release hardening for Google Play and web launches.
FlutterPWAFirebaseSupabasePlay Console
DevOps
Infra and release engineering
VPS setup, reverse proxies, SSL, backups, release pipelines and the boring reliability work that keeps products alive.
DockerUbuntuNginxCI/CDCloudflare
DevOps
Infrastructure, DevOps and release setup
Server setup, delivery pipelines, observability, SSL, backups and production stabilization on VPS infrastructure.
DockerNginxUbuntuCI/CDCloudflare
Automation
Automation, bots and integrations
Automation layers, bots, integrations and internal workflows that reduce manual operations and speed up execution.
Pythonn8nTelegram BotsPostgreSQLREST API
AI
AI assistants and automation
AI assistants, automation pipelines, bots, internal tools and business-oriented integrations that save team time.
PythonOpenAI APIn8nTelegram BotsVibe Coding
AI
AI tools and assistants
AI assistants, operational copilots and business-facing tools that package LLM capability into practical workflows.
OpenAI APIPrompt SystemsRAGNo-codeFlutterFlow
Portfolio
Selected work that feels product-grade, not freelance-rushed.
Each case is laid out as a product story: context, execution, stack and measurable result.
2025
Dispatch Core Platform
Next.jsPostgreSQLSupabase
Built a dispatcher platform with live status boards, courier routing, SLA dashboards and role-based operations tooling.
+38%
Dispatch speed
-52%
Manual operations
-19 h/week
Ops time
2025
MoveFit Membership App
FlutterSupabaseFirebase Auth
Delivered a cross-platform membership product with schedules, QR access, push reminders and launch support.
99.6%
Crash-free sessions
+27%
Repeat sessions
10/10
Launch readiness
2025
MoveFit Membership App
FlutterSupabaseFirebase Auth
Delivered a cross-platform subscription product with classes, reminders, QR access and launch support.
10/10
Store readiness
99.6%
Crash-free sessions
+27%
Return users
2024
Agency AI Ops Layer
PythonOpenAI APIn8n
Built a workflow layer for briefs, estimates, response drafts and internal approval chains around AI-assisted operations.
-74%
Lead handling time
-11 h/day
Manual copy-work
+100%
Pipeline visibility
2024
Agency AI Ops Layer
PythonOpenAI APIn8n
Built a workflow layer for briefs, estimates, response drafts and internal approval chains.
-74%
Lead processing
-11 h/day
Manual copy work
+100%
Ops visibility
2024
Cloud Relay Control Desk
DockerNginxGitHub Actions
Stabilized a release pipeline, observability stack and multi-service deployment flow for a product under active growth.
-63%
Deploy time
+4x
Incident visibility
High
Rollback confidence
Process
A calm engineering process clients can actually rely on.
The delivery style is calm: understand the business goal, remove risk early, show progress quickly and finish cleanly.
01
Context and scoping
Quick discovery, business context, risk map and a realistic scope before writing unnecessary code.
02
Visible execution
Transparent milestones, early working previews and decisions explained in plain business language.
03
Release and hardening
Testing, release hardening, admin convenience and operational stability before public launch.
04
Support and growth
Documentation, handover and post-launch support so the project remains manageable after delivery.
Stack
Broad enough to move independently. Focused enough to stay accountable.
The stack is intentionally broad: I can close interface, backend, release and automation work without splitting responsibility between five contractors.
Languages
TypeScriptJavaScriptPythonDartSQL
Frontend and mobile
Next.jsReactFlutterPWAFlutterFlow
Backend and data
Node.jsSupabasePostgreSQLREST APIAuth
Infra and release
DockerUbuntuNginxCI/CDCloudflare
AI and automation
OpenAI APIAutomationBotsNo-codeVibe coding
Publishing
Mobile publishing support
I have an old Google Play developer account and can help with client app publishing by agreement, release preparation and store-ready asset handling.
This is discussed individually and only in a format that does not conflict with platform policies or ownership expectations.
Trust
What collaboration feels like on the client side.
We came for a website and got a stable product foundation with sane architecture, analytics and release discipline.
Fast communication, clean implementation and strong engineering judgment. It felt like working with a senior product partner.
He sees weak spots early, keeps delivery calm and still moves fast. That combination is rare on freelance projects.
Need a senior engineer who can close the loop end to end?
Direct response, realistic estimates and delivery without vanishing in the middle of the task. If the request is urgent, mention it in the message.